Posts tagged 'primary standards'

SpecCheck standard
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What are SpecCheck standards and can they be used for calibration?

SpecCheck standards are solid gel secondary standards produced by Hach.  They are for use with their photometers. They are presented in sealed glass cells, so they are ready to use out of the box, with no preparation. Within each pack of standards, 4 vials are provided. One is a blank along with 3 coloured gel standards. They are available for a number of parameters including chlorine...
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